The problem of old technologies isn't specific to the shipping industry, this is true for many large, long running industries where working systems matter. You

The problem of old technologies isn't specific to the shipping industry, this is true for many large, long running industries where working systems matter. You see old technologies in banking and you see it in transport for example. Shipping has a better fitting use case for blockchain than many industries due to interoperability with third parties and the need for tracking and auditing. Maersk won't have bet the farm on this, I'd be inclined to see it as leading a forward looking experimentation with new technologies that hasn't panned out.